ISIS is dominating the headlines, but how much do we really know about the brutal terrorist group? How did ISIS become a major force so quickly? You may be shocked to learn that their startling rise to power may be followed by a relatively quick fall from grace.

Producer James Jones and Columbia University North Korea scholar — and former CIA analyst — Sue Mi Terry participated in a live chat on Wednesday to answer questions about Frontline's new documentary, "Secret State of North Korea." They were joined by guest questioner, The World's Aaron Schachter.

The music world has paid tribute to singer and former Velvet Underground frontman Lou Reed, who died on Sunday aged 71. To many fans, Lou Reed represents the dark and dangerous side of the Lower East Side in New York. But in 1973, Lou Reed recorded an album that moved the doom and gloom to East and West Berlin.

Dozens are dead and as much as two-thirds of the country has been affected as Mexico has been battered by a series of tropical storms this week. Host Aaron Schachter gets the latest from reporter Jennifer Collins in Mexico City.

Some of Russian President Vladimir Putin's most avid fans are members of a Slavic motorcycle gang known as the Night Wolves. Anchor Aaron Schachter finds out more from journalist Simon Shuster, who's written about Putin for Time Magazine.

The residents of the Australian town of Tecoma are fighting against a proposed McDonald's restaurant opening in their community. The group, known as Burger Off, took a petition of 95,000 signatures to McDonald's international headquarters in Chicago.